CVE-2026-79780rclone before v1.75.0 Credential Exposure via S3 Redirect
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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rclone before v1.75.0 fails to sanitize IBM IAM bearer tokens and SSE-C encryption keys during S3 redirect callbacks, allowing credentials to be preserved across scheme or host changes. Attackers observing network traffic from a trusted endpoint can capture reusable IBM IAM tokens on same-host HTTPS-to-HTTP downgrades or SSE-C keys on cross-origin redirects to access protected S3 objects.
- CVSS
- 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
- Weakness (CWE)
- CWE-200
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Awaiting Analysis
- Record last updated
- Aug 25, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
rclone rclone rclone:rclone (from the name) | before 1.75.0; 1.75.0 not affected | CNA record |
References
- https://github.com/rclone/rclone/security/advisories/GHSA-8mxv-9xhp-86h4vendor-advisory
- https://www.vulncheck.com/advisories/rclone-before-credential-exposure-via-s3-redirectthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.